So is there a point where, as a society, we decide to stop medicalizing and diagnosing everything and just work with individuals the ways that work best for the individual without regard to neurology etc? The more we study it, the more complex it seems to get, the more ways there are to justify a diagnosis, a highly subjective process.
I'll also add that there are a lot of parents desperate to get their kids whatever diagnosis they can to give them an advantage in taking tests.
I'd also say that trauma and stress are still often ignored in preference of a developmental diagnosis that can lead to the easy solution of a prescription.